i must deal with easily 10 cars a week using shitty supermarket crap, making petrol cars lean and put lambda codes up even when there switching bang on, bringing cat fault codes up etc, diesels, same again. Lots of moisture in fuels now! Maby due to storage, geneticaly modified fuels?

take fuel filter off and empty contents onto (i use brown paper floor mats) something thats gonna show up shiny metal filings, this shows fuel pressure pump breaking up

otherwise injectors having poor performance/not injecting enough can cause pressure iregularitys.

even easyer could be rail pressure sensor faulty!

you need digital (diagnostic gear looking at ecu readings) output data
mechanical pressure data and spill off levels

i hate diesels

p.s why is throttle position 100%?????????